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Part number 550-100-400/0119
83
®
Series 4
gas-fired water boiler — Boiler Manual
DIRECT EXHAUST venting — general
Vent and air piping materials
1. See Figure 13, page 19 for approved vent and air piping materi-
als, for both and .
— Do not connect different types of
piping together.
Vent piping
1. Boiler fl ue gases must be piped from the boiler to outside, fol-
lowing the instructions in this manual, and compliant with all
applicable codes. The vent pipe must terminate either through
the sidewall or through the roof, located with the correct sepa-
ration from the air termination. See the associated instructions
in the following pages.
2. Each Ultra boiler requires a separate vent. common
vent.
Combustion air openings for direct
exhaust
Combustion and ventilation
air for direct exhaust boilers is provided from the
boiler room. Follow all instructions in the Boiler
manual and this addendum plus all applicable codes,
providing combustion air openings as specifi ed.
Failure to comply could result in severe personal
injury, death or substantial property damage.
1. Combustion air must be supplied through openings into the
boiler room, following the instructions in this manual, and
compliant with all applicable codes. Read the warning on
page 16 , and ensure the air and boiler room will not contain
contaminated air.
2. Where the Ultra boiler shares a space with other appliances, the
combustion air openings must be sized to handle the combined
requirements of all appliances in the space.
SIDEWALL direct exhaust option
1. Read and follow instructions in Boiler manual, including
page 65 for Massachusetts installations when applicable.
VERTICAL direct exhaust option
1. Read and follow instructions in Boiler manual, including
page 65 for Massachusetts installations when applicable.
SIDEWALL
DIRECT EXHAUST
VERTICAL
DIRECT EXHAUST
Every vent pipe requires a
. Bird screens are not supplied
with the Ultra boiler. Purchase separately from
Weil-McLain.
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